* {
    padding: 0;
    margin: 0;
}
header {
    height: 42px;
    background-color: #f1f1f1;
    text-align: center;
    line-height: 42px;
    font-size: 20px;
}
nav {
    width: 1377px;
    height: 406px;
    margin: 0 auto;
}
article {
    width: 1400px;
    height: 200px;
    margin: 0 auto;
    /* background-color: pink; */
}
article .one {
    list-style: none;
}
article .one li img {
    margin-left: 43px;
    margin-top: 20px;
    float: left;
}
.top .two {
    margin-left: 100px;
}
.tthree {
    margin-left: 100px;
}